16:9 pseudolook in outview of an opengl render?

i want to put a black rectancle on the top and bottom of a 4:3 opengl rendering outputwindow to have a (fake)look closer to 16:9 and a wider looking viewpoint… i don’t want to lose the performanceadvantage of opengl rendering so i’m looking for a method at which i haven’t switch to matrixoutput…

I’m doing a similar thing for the ‘rotor’ performance. To get such a letterbox 16:9 view you can render 2 balck rectangles on top of your output. To do this you need to set all your geometry creating gl objects to ‘automatic 0′, and bang the jit.gl.sketch or whatever object you want to use for the black bars after the other openGL objects. I’ve added a small patch demonstrating the principle.